sampling by group in R

I have a large sample data of healthcare data called oct

Providers  ID date ICD
Billy  4504 9/11 f.11
Billy  5090 9/10 r.05
Max   4430  9/01 k.11
Mindy 0812 9/30  f.11 
etc. 

I want a random sample of ID numbers for each provider. I have tried.

review <- oct %>% group_by(Providers) %>% do (sample(oct$ID, size = 5, replace= FALSE, prob = NULL))